How to reset network settings on iphone?

To reset network settings on an iPhone, open Settings, tap General > Transfer or Reset iPhone > Reset, and select Reset Network Settings.Step-by-Step Procedure to Reset iPhone Network Settings1.Open General Settings:Step 1.Open the Settings app on your iPhone and tap General.2.Navigate to Reset Options:Step 2.Scroll down to the bottom of the menu and select Transfer or Reset iPhone.3.Select Reset Network Settings:Step 3.Tap Reset at the bottom of the screen, then choose Reset Network Settings from the popup menu.4.Authenticate & Confirm:Step 4.Enter your iPhone passcode (and Screen Time passcode, if prompted), then tap Reset Network Settings to confirm. Your device will restart automatically.What Gets Reset vs. What Remains SafeData Type / FeatureReset ImpactWhat HappensWi-Fi Networks & PasswordsDeletedAll saved Wi-Fi connections and login credentials are removedBluetooth DevicesDeletedPaired headphones, speakers, and accessories must be re-pairedCellular / APN SettingsResetRestores default cellular data preferences and carrier profilesVPN Configuration ProfilesDeletedManually installed VPN profiles and server credentials are clearedPhotos, Messages, Apps, Contacts100% SafePersonal data and media are completely untouchedWhen Should You Reset Network Settings?Wi-Fi Connection Failures: You cannot join known Wi-Fi networks or keep getting "Incorrect Password" errors.Cellular Data Dropping: Frequent "No Service" or "Searching" errors despite having carrier coverage.Bluetooth Pairing Errors: Wireless accessories refuse to connect or disconnect continuously.Call & iMessage Failures: Calls dropping frequently or iMessage failing to activate after a carrier update.